Computer Vision Foundations · 免费预览
时空滤波器组
将「Gabor」滤波器扩展到时空域使其对平移具有选择性，但单个倾斜滤波器无法确定速度；沿谱平面对正交能量求和，可构建出能确定速度的单元，即一种类 MT 的双层网络。
1. Filters that watch time
Filters that watch time
2. One filter cannot name a speed
One filter cannot name a speed
3. Planes close the case
Planes close the case
4. Velocity as argmax, and the MT echo
Velocity as argmax, and the MT echo
5. Why tilt encodes velocity
A spatiotemporal Gabor's stripes are tilted in the x-t slab. Why does tilt correspond to velocity?
6. Why planes and not single filters
Why does one spatiotemporal Gabor fail to determine velocity, and how does the plane construction fix it?
7. Amplitude of a motion pair
A quadrature pair in the spatiotemporal bank returns h = -2 and q = 3. Write the amplitude a to one decimal place.